The man stabbed to death in Greenwich on Friday has been named as 29-year-old Reece Williams as a second person has been arrested in connection with the murder.
Williams was found with severe injuries after a stabbing in Welland Street, SE10 at around 1am on Friday, July 30.
The man was given CPR before being taken to hospital, where police said he died at 2.37am.
He has since been named as Reece Williams, who was aged 29. His family have been informed and are being supported by specialist officers.
Met Police said that a 25-year-old woman was arrested on suspicion of murder and perverting the course of justice on Friday, 30 July.
She remains in custody at a south London police station.
A 20-year-old man was also found nearby suffering from stab injuries. He was taken to hospital, where he remains in a stable condition, and he was previously arrested on suspicion of murder.
Officers from the Specialist Crime Command are investigating and say they are keen to hear from any witnesses who have not yet spoken to police.
Police said a crime scene is in place and inquiries into the circumstances are continuing.
Any witnesses or anyone who has information that could help police are urged to call 101.
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